Tlesch



A ,2 Sileets-Sheet 1.

PBRMUTATION LOCK,

2 Sheets-Sheet 2.

C. PLESCH. PBRMUTATION 1.00K.

No. 62,191., PatntedFeb 19. 1867.

miner-w11 A Inl/1min.

CHARLES ELESGH, ror ROCHESTER, NEW YORK.4

Letters Patent No. 62,191, dated February 19, 1867.

IMPROVEMENT IN PERMUTATION LOCKS.

-r'o ALL wHoMA `I'r MAY concERN;

lBe it known that I, CnAnLns Fnsson, of Rochester, in the county ofMonroe, and State of New York, have invented certain new and useful improvements in Locks; and I do hereby declare that the following is a full and exact' description thereof, reference being had to the accompanyingdrawings, making part ofthis speciication.

Figure 1 is an inner elevation ofthe mechanism locked. Figura- 2, a similar viewV unlocked. Figureilial vertical cross-section through the key-shaft.

Figune 4:21. diagram, showing the method of operating the oscillating-plate. Figure 5, a diagram showing themethod of'operating the dog-plate. i

Figures 6, 7, and 8, views showing one of the combination wheels, and the method of adjusting' the centre, Figure. 9, view of the key for operating the screw for tghteningithe centres of the wheels. Like letters of reference indicate corresponding parts in all the figures. My improvements belong to that cla-ss known as combination o1' permutation locks.A As representedin the drawing- A is the case of the-lock; B the back plate, which isremovable; and C is the stem of `the heavy bolt-work of the safe door, which is thrown in and out to locker unlock the' safe; the' lock proper-.simply holding .the

stem out when locked, but 'allowing itto retreat when unlocked. The usual key-shaft, D, is employed, having a head, a, inside, substantially of 4the form shown, and projecting-suiiiciently to allow small rollers, or equivalent cams, b b, to Be secured on the back side, as clearly shown in figs. 3 and 4.' A depressom c, is also made in the edge of the head a', in the proper position for the end of the dog-plate lto i`a'.lltherein, a's'will be presently described, and on euch side of' this, small cams, jj. Abovethe rollers b b is p ivoted at d an oscllating-plate having rounded parts or cheeks f f, which, as the rollers b b strike them' alternately, oscillate the plate'back "and forth. At the top of the oscillatingfplate is a ily, g, of the diamond or double pointed form shownQhich of course also oscillates with'the plate. This ily projects over and moves in a slot, h, of a. dog-plate, F, which slides up and down in ways or guides The slot h is open at the top, a little'mre than the major diameter of the ily; and at opposite extremities it has indentations'or cavities, m m, into which strikes at the extremes of its strokes, and thus holds the dog-plate in an elevated position. -It alsojhas am surface, t, for the' iiy to strike on in unlocking the device, as will presently be described. The log-#plate s' provided with the ordinary dog la, that strikes into the notches of the combination wheels as usual, and it also has a rounded extremity, l,

that fallsy into the depression c of the -headof the key-shaft, whenthe dog falls in the notches. It will be seen that the dog-plate can fall to allow the dog toenter the notches of thewheels only when the ily is centred in the slot lz, as shown in iig. 1; at ally other times, the ily striking into the indentations m m, will hold the dogplate away from the wheels,a'nd in turning to the right, or away from the stem- C of `the heavy bolt-work, the ily is thus centred only when one or the other of the campoints jj comes directly under the extremity Z `of the dog-plate, which thus catch said plate and still hold it up. Butv in turning in the opposite direction, or towards the stem of 4the heavy bolt-work, when the suitable time comes, thedepression c will come in coincidence with the central portion of the y in the slot, 'and then the dog will drop in thenotches of the wheels, and the parts can be unlocked; The dog-plate is provided with a projection, '11, jointed toa similar projection, o, of one of a Vpair of jaws, Gr G, pivoted at p p. The heads` g q of these jaws are made to approach each other, and to strike together when the lock is locked, and thereby form a stop to hold the stem C ont, as shown in fig. 1, but to separate or open, to admit the said stem when unlocked, as shown Vin iig.` 2'. This action is accomplished by means of right-angled arms, r r, of said jaws, forming toggle-levers of 'the form substantially' as shown. The jaws receive their motion -to unlock by reason of the fly g-striking over the caml surface t'of the dog-plate, thereby throwing said plate down by positive force; 4and the iiyis thus enabled to strike over said: cain surface by reason of a slight vertical play at the joints-'n o. The jaws 'are again closed by means of the cams j striking the extremity Z. The motion of the jaws in striking together is limited by fixed stops, u u. The combination wheels H H H are 4secured on a bearing, forming part of the back plate B, and are providsdzwith -the usual notches o n v, for the dog 1c tostrike-into when in the proper position. These wheels are each made'of a body,

u, and a centre, z, as usual, and also arim or ring y, which its iufthe back ofthe body and clamps down upon the centre x, tothold it in any given position. In order to thus clamp thecentre e'ectually, I prefer to insert ordinary screws, z e, on one side, and a. conical orV other shaped screw, a', at the other. To insert this screw so that it sha-ll relieve the rim y from pressure on the centre, when it is desirable to change the combination, I would make the screw witli two shoulders, ZJ c', at the head, with a groove between, and this groove I slide into a slot, d', made in the edge of the rim, ofjust such width as to receive it, but still allow the shouldersb e to hold above and below. Thus it will be seen that as the screwis screwed in tlieiin is tightened down upon -the centre, and as it is screwed out the rim will be drawn back, by reason of its natural spring,suilciently for 1 the centre'te be changed.A The screw a is provided with a square socket, f, in which lits a key, y', inserted from the outside of the lock. When the wheels are all properly adjusted on a lino, 4this key Visinserted through.' i the screws, and the latter loosened, when the shaft D is turned, thereby adjusting the centres :t zv, asQmay be desired; and the screws are then tightened down again, thereby setting the wheels, without .opening thelock. If desired that portion of the rim which clamps down upon the centre niay be provided with a 4small rib or ridge tostrike still harder, but under ordinary circumstances this is not necessary. Y

What I claim as my invention, and desire to secure by Letters Patent, is v 1. The combination of two jaws, G G, connected by the togglelevcrs 1* r, or equivalent, operating substantially as and for the purpose herein set forth. l I.

2..The combination of the dog-plate F, with the jaws G Gr, operating substantially as aud for the purpose specified. g y A 3. The combination of oscillating y g, with the dog-plate F, or equivalent, operating Ain such a manner asA to allow said plate to fall when centred, but to'hold it elevated at all other times, as specified. i

4. Thecombination of the rollers or cams b I, of the head a, with the oscillating-plate. E, operating substantially as and for the purpose set forth.

5. Se connecting the head a, with the dog-plate F, or equivalent, that in turning from'the bolt, said plate" will only touch the cam pointsjj, .but in turning toward the bolt the dog will be allowed to fall to unlock the device, substantially asset forth. i

6. Clamping the centre of the combination wheels in place, by means of a. rim y, tightened or loosened by screw, a', or equivalent, asset forth. I .A

7. Connecting the screw a with the rim y, by means of the shoulders b c', or equivalent, andftho slot d', in such a manner that the rinn is attached to and vrises with the screw, substantially as specied.

In witness whereof .I have hereunto signed-my name in the presence of two subscribing witnesses;

, CHARLES FLEscH-- Witness es JAY HYATT, DOMINIK FISHER, 

